Uplink and downlink ground automatic neutral section passing commutation device considering standby

Abstract

The utility model relates to the technical field of electrified railway traction power supply, and particularly discloses a standby-considered uplink and downlink ground automatic neutral section passing commutation device, which is based on a standby commutation process, can timely respond and control a standby neutral section passing device to replace commutation action to continue to complete commutation when the neutral section passing device breaks down, so that the standby neutral section passing device is prevented from being damaged. The tight connection of the standby neutral section passing device in the uplink and downlink ground automatic neutral section passing commutation considering standby is realized, and the stability of train commutation entering the neutral section area is improved.

Description

Technical Field

[0001] This utility model relates to the field of traction power supply technology for electrified railways, and in particular to an automatic phase-switching device for up and down lines with backup considerations. Background Technology

[0002] In my country, electrified railways generally adopt a single-phase power frequency AC system. To reduce the negative sequence impact on the power grid, electrified railways often employ a scheme of alternating phase sequence and phase-separated zone power supply. Adjacent power supply sections at the phase separation points are separated by air or insulators, with a neutral section set in between, referred to as electrical phase separation or phase separation. The neutral section is a non-energized area.

[0003] When a train passes through an electrical phase-splitting zone without power, it will experience a power outage, resulting in reduced speed, train deceleration, or even breakdown, impacting the line's operational capacity. To address this, various ground-controlled automatic phase-splitting devices have been developed to reduce the train's power outage time and thus minimize its impact on speed. The earliest devices were based on vacuum switches, later evolving to thyristor switches, which have largely solved the problem of train speed loss during phase-splitting.

[0004] Because electrical equipment is added to the neutral section, equipment failures are possible. Railway transportation is a special industry that generally requires backup plans. In traditional automatic phase-crossing systems for both up and down traffic, the commutation process and functional handover are not adequately designed with backup in mind. This results in deviations in the timing of train commutation during the backup phase-crossing device's control, leading to problems such as train speed drops. Summary of the Invention

[0005] In order to overcome the problems of imperfect phase switching affecting line operation when considering backup in existing automatic phase switching, this utility model provides an uplink and downlink ground automatic phase switching device that takes backup into account.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0007] In a first aspect, this utility model provides an uplink / downlink automatic phase-switching ground device with backup considerations, the device comprising:

[0008] The commutation unit is used to commutate the train entering the phase separation zone by controlling the phase separation device based on the commutation process.

[0009] The monitoring unit is used to obtain the status of the phase-splitting device under the current commutation process;

[0010] A control unit is configured to, in response to a fault condition in the phase-splitting device, control the phase-splitting device to disconnect from the phase-splitting zone and control a backup phase-splitting device to connect to the phase-splitting zone;

[0011] A backup commutation unit is used to control the backup phase-splitting device to continue commutating the train based on the backup commutation process.

[0012] According to one specific embodiment, in the above-described apparatus, the commutation unit is specifically used for:

[0013] In response to the train about to enter the phase separation zone, the power supply arm on the entering side is connected to the neutral section.

[0014] In response to the train fully entering the phase-separation zone, the power supply arm on the entering side is switched off from the neutral section, and the power supply arm on the exiting side is switched on from the neutral section.

[0015] In response to the train passing through the phase separation zone, the power supply arm on the departure side and the neutral section are switched off.

[0016] According to one specific embodiment, in the above-described apparatus, the backup commutation unit is specifically used for:

[0017] Obtain the current position of the train when the phase-splitting device is disconnected;

[0018] Based on the current position of the train, the executed commutation process is determined, and the remaining backup commutation process is obtained.

[0019] According to one specific embodiment, in the above-described apparatus, the commutation unit is further configured to:

[0020] In response to the train about to enter the phase-splitting zone, the power supply arm on the entering side is controlled to be connected to the neutral section, and the first voltage of the neutral section and the second voltage of the power supply arm on the exiting side are obtained.

[0021] Integrate the first voltage to obtain the first voltage integral value, and integrate the second voltage to obtain the second voltage integral value;

[0022] In response to the train fully entering the phase-splitting zone, calculate the absolute value of the difference between the first voltage integral value and the second voltage integral value;

[0023] In response to the absolute value being less than a predetermined threshold, the power supply arm on the departure side and the neutral section are controlled to be turned on.

[0024] In response to the train passing through the phase separation zone, the power supply arm on the departure side and the neutral section are switched off.

[0025] According to one specific embodiment, in the above-described apparatus, the backup commutation unit is further configured to:

[0026] Obtain the contact network voltage and the train's current position when the phase-splitting device is disconnected;

[0027] Calculation nodes are generated based on the aforementioned contact network voltage;

[0028] Based on the current position of the train, determine the phase commutation process that has been executed;

[0029] The remaining backup commutation procedures are obtained based on the commutation procedures that have been executed.

[0030] According to one specific embodiment, in the above-described apparatus, the backup commutation unit is used to control the backup phase-crossing device to continue commutating the train based on the backup commutation process, including:

[0031] The contact network voltage is reacquired through the backup commutation device and matched with the computing node to execute the remaining backup commutation process.

[0032] Secondly, this utility model provides an automatic phase-switching device for uplink and downlink ground circuits, the device comprising:

[0033] Axle counting sensors, located in the phase-separation zone, are used to obtain the train's location;

[0034] A backup phase-splitting device is located in the phase-splitting zone and is used to control the conduction and cutoff between the power supply arm and the neutral section;

[0035] A switching device for connecting the phase splitter to the phase splitting zone, and for connecting a standby phase splitter to the phase splitting zone;

[0036] A control device for performing phase commutation on trains entering a phase-separation zone using an automatic ground-based phase-separation commutation device with backup as described in any of the preceding claims.

[0037] According to one specific implementation, in the above-described device, the phase-splitting device is connected to the uplink and downlink lines of the phase-splitting zone via the switching device, and the backup phase-splitting device is connected to the position in the phase-splitting zone corresponding to the phase-splitting device via the switching device.

[0038] According to a specific embodiment, in the above-mentioned device, the phase-splitting device and the backup phase-splitting device have the same structure, including a voltage detection device, a first thyristor device, and a second thyristor device; the voltage detection device is used to detect the voltage of the power supply arm on the driving-in side, the voltage of the power supply arm on the driving-out side, and the voltage of the neutral section; the first thyristor device is used to connect the power supply arm on the driving-in side and the neutral section; and the second thyristor device is used to connect the power supply arm on the driving-out side and the neutral section.

[0039] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0040] This utility model determines the backup phase switching process based on the phase switching process, which can respond in a timely manner when the phase switching device fails, and control the backup phase switching device to take over the phase switching action to continue to complete the phase switching. It realizes the close connection of the backup phase switching device in the automatic phase switching of the up and down ground with backup in mind, and improves the stability of the train phase switching when entering the phase switching zone. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the electrical main topology of the ground-based automatic phase-switching device provided in the embodiments of this application;

[0042] Figure 2 Wiring diagram of an uplink / downlink automatic phase-crossing ground device considering backup, provided for embodiments of this application;

[0043] Figure 3 A schematic diagram of the electrical topology of the uplink and downlink automatic phase-crossing ground devices, considering backups, is provided for embodiments of this application.

[0044] Figure 4 A schematic diagram of the electrical topology of an uplink / downlink automatic phase-crossing device considering backup, provided for another embodiment of this application;

[0045] Figure 5 A schematic diagram of the control device provided in the embodiments of this application.

[0046] Figure 6 This is a schematic diagram of a ground automatic phase-switching device for uplink and downlink that takes into account backup, provided as an embodiment of this application. Detailed Implementation

[0047] The present application will now be described in further detail with reference to experimental examples and specific embodiments. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present application to the following embodiments; all technologies implemented based on the content of the present application fall within the scope of the present application.

[0048] The terms "first," "second," etc., used in the specification, embodiments, claims, and drawings of this application are for distinguishing purposes only and should not be construed as indicating or implying relative importance or order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, such as including a series of steps or units. A method, system, product, or apparatus is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or apparatuses.

[0049] This application provides an automatic phase-switching device for up and down traffic, including an axle counting sensor, a backup phase-switching device, a switching device, and a control device, for switching trains entering a phase-switching zone. To better explain the technical solution provided in this application, the phase-switching process of a train entering a phase-switching zone is described below. First, it should be noted that the adjacent contact network ends of the power supply sections of two adjacent traction substations, and the parallel switches used to separate the ends of the traction power supply networks of the two traction substations, constitute the phase-switching zone.

[0050] Please refer to Figure 1 This diagram illustrates the electrical main topology of the ground-based automatic phase-switching device provided in an embodiment of this application. It includes axis counting sensors PS1 to PS4, a first thyristor device SCR1, and a second thyristor device SCR2, all connected via communication.

[0051] To ensure clarity in the description of the embodiments in this application, trains will be referred to as trains in the following description. Figure 1 The route shown enters the phase-crossing region from left to right, that is, Figure 1 The left side of the route shown is the inbound side, and the right side is the outbound side.

[0052] The axle counting sensors are installed in the track area to detect the train's position. These include a first axle counting sensor PS1, a second axle counting sensor PS2, a third axle counting sensor PS3, and a fourth axle counting sensor PS4. It should be noted that trains on the track can travel in both directions. Therefore, the four axle counting sensors are installed at four preset positions symmetrically on the entering and exiting sides to obtain the train's location and output signals to the control device indicating whether the train is about to enter the phase separation zone, has completely entered the phase separation zone, or has passed through the phase separation zone.

[0053] Preferably, the axle counting sensors are installed by measuring 35m to the left and right of the point perpendicularly projected onto the rail from both ends of the neutral section. Then, another point is determined by measuring 170m outward from this 35m point. This second point is 205m from the neutral section. In other words, the first axle counting sensor PS1 and the fourth axle counting sensor PS4 are 205 meters from the points perpendicularly projected onto the rail from the neutral section, while the second axle counting sensor PS2 and the third axle counting sensor PS3 are 35 meters from the points perpendicularly projected onto the rail from the neutral section.

[0054] The power supply arm on the entering side is connected to the neutral section via a first thyristor device, and the power supply arm on the exiting side is connected to the neutral section via a second thyristor device. It should be noted that, to ensure the safety and integrity of the train operating line, a circuit breaker K1 is installed between the power supply arm on the entering side and the first thyristor device, and a circuit breaker K2 is installed between the power supply arm on the exiting side and the second thyristor device.

[0055] The voltage detection device employs voltage transformers. A first voltage transformer, PT1, is connected in parallel to the connection line between circuit breaker K1 and the first thyristor device, used to detect the voltage of the incoming power supply arm. A second voltage transformer, PT2, is connected in parallel to the connection line between circuit breaker K2 and the second thyristor device, used to detect the voltage of the outgoing power supply arm. A third voltage transformer, PT3, is connected in parallel to the connection line between the first and second thyristor devices, used to detect the voltage of the neutral section.

[0056] Furthermore, the phase-switching device provided in this application embodiment also includes a current detection device, which is a current transformer. A first current transformer CT1 is connected in series in the connection line between the circuit breaker K1 and the first thyristor device, used to detect the current of the incoming power supply arm. A second current transformer CT2 is connected in series in the connection line between the circuit breaker K2 and the second thyristor device, used to detect the current of the outgoing power supply arm. A third current transformer CT3 is connected in series in the connection line between the first thyristor device and the second thyristor device, used to detect the current in the neutral section.

[0057] It is understood that in the ground-based automatic phase-switching device provided in this application embodiment, the backup phase-switching device has the same structure as the phase-switching device, and will not be described again here. Please refer to Figure 2 It shows a wiring diagram of an uplink / downlink ground automatic phase-switching device according to an embodiment of this application, and Figure 3 This document illustrates an electrical topology diagram of an uplink / downlink automatic phase-switching ground device according to an embodiment of this application. Combined with... Figure 2 and Figure 3 As shown, the phase-splitting device is connected to the uplink and downlink lines of the phase-splitting zone via the switching device, and the backup phase-splitting device is connected to the corresponding position in the phase-splitting zone via the switching device. Specifically, the uplink phase-splitting device is connected to the uplink phase-splitting zone via connection points 1, 4, and 7, and the downlink phase-splitting device is connected to the downlink phase-splitting zone via connection wires 2, 5, and 8. The phase-splitting device is connected to the power supply arm on the entering side, the neutral section, and the power supply arm on the exiting side via three connection points. The backup phase-splitting device is connected to both the uplink and downlink power supply arms via connection point 3, to both the uplink and downlink neutral sections via connection wire 6, and to both the uplink and downlink exiting side power supply arms via connection point 9. It is also connected to the power supply arm on the entering side, the neutral section, and the exiting side via three connection points.

[0058] Furthermore, combined Figure 2 Please refer to Figure 4 It illustrates an electrical topology diagram of an uplink / downlink automatic phase-switching ground device according to another embodiment of this application. This configuration is more flexible, but... Figure 3Its topology is complex, its cost is high, and its footprint is large.

[0059] The aforementioned automatic phase-change switching device for both up and down lines can simultaneously meet the requirements for automatic phase-change switching of up and down trains, while also considering backup. It requires the fewest devices and offers the best economic efficiency, saving one set of equipment compared to traditional automatic phase-change switching schemes that consider backup. Specifically, the backup phase-change switching device is connected to both the up and down lines via a switching device. This allows it to be used as a backup for both up and down trains simply by switching the device when either the up or down line's phase-change switching device fails. In this embodiment, the backup phase-change switching device is connected to both the up and down lines via a switching device. This allows it to be used as a backup for both up and down trains simply by switching the device when either the up or down line's phase-change switching device fails. By using one backup phase-change switching device as a backup for both up and down lines, the number of backup phase-change switching devices can be reduced, thus saving costs.

[0060] Further, please refer to Figure 5 The diagram illustrates the structure of the control device provided in this embodiment. The control device is used to read the fault status of the up and down phase-splitting devices, the signal from the axle counter sensor, and the status of the switching device. Simultaneously, based on the fault status and the axle counter sensor signal, it can control the phase-splitting device to disconnect and connect a backup phase-splitting device, thereby controlling the thyristor operation to perform phase commutation on trains entering the phase-splitting zone.

[0061] Specifically, the control device adopts an uplink and downlink automatic phase-switching device with backup provided in the embodiments of this application. The structure and operation of the uplink and downlink automatic phase-switching device with backup are further described below.

[0062] Please refer to Figure 6 The illustration shows a schematic diagram of a ground automatic phase-switching device for uplink and downlink with backup provided in an embodiment of this application, including a switching unit, a monitoring unit, a control unit, and a backup switching unit.

[0063] To better illustrate, Figure 1 For example, in the embodiments of this application, a typical commutation process includes:

[0064] S101, in response to the train about to enter the phase separation zone, control the power supply arm on the entering side and the neutral section to be turned on;

[0065] S102. In response to the train fully entering the phase separation zone, control the power supply arm and neutral section on the entering side to disconnect, and control the power supply arm and neutral section on the exiting side to conduct, thus completing the phase commutation.

[0066] S103, in response to the train passing through the phase-splitting zone, controls the power supply arm on the departure side and the neutral section to be turned off, so that the phase-splitting zone returns to the operating condition before the phase split.

[0067] In one possible implementation, the commutation process further includes:

[0068] S201, In response to the train about to enter the phase separation zone, control the power supply arm and neutral section to be turned on on the entering side;

[0069] S202. Obtain the first voltage of the neutral section and the second voltage of the power supply arm on the driving-out side, integrate the first voltage to obtain the first voltage integral value, and integrate the second voltage to obtain the second voltage integral value.

[0070] S203, in response to the train fully entering the phase separation zone, control the disconnection of the power supply arm and neutral section on the entering side;

[0071] S204. Calculate the absolute value of the difference between the first voltage integral value and the second voltage integral value.

[0072] S205. In response to the absolute value being less than a predetermined threshold, control the power supply arm on the departure side and the neutral section to be turned on.

[0073] S206. In response to the train passing through the phase-splitting zone, the power supply arm on the departure side and the neutral section are turned off, so that the phase-splitting zone returns to the operating condition before the phase split.

[0074] Based on the above commutation process, the commutation unit provided in this application embodiment is used to control the phase-separating device to commutate the train entering the phase-separating zone based on the commutation process. The monitoring unit is used to obtain the status of the phase-separating device under the current commutation process. The control unit is used to control the phase-separating device to disconnect from the phase-separating zone and control the backup phase-separating device to connect to the phase-separating zone in response to the fault status of the phase-separating device. The backup commutation unit is used to control the backup phase-separating device to continue commutating the train based on the backup commutation process.

[0075] The commutation process is as described in S101 to S103 above, and the commutation unit is specifically used for:

[0076] In response to the train about to enter the phase separation zone, the power supply arm on the entering side is connected to the neutral section.

[0077] In response to the train fully entering the phase-separation zone, the power supply arm on the entering side is switched off from the neutral section, and the power supply arm on the exiting side is switched on from the neutral section.

[0078] In response to the train passing through the phase separation zone, the power supply arm on the departure side and the neutral section are switched off.

[0079] Correspondingly, the backup commutation unit is specifically used for:

[0080] Obtain the current position of the train when the phase-splitting device is disconnected; determine the executed phase-splitting process based on the current position of the train, and obtain the remaining backup phase-splitting process.

[0081] Furthermore, in another possible implementation, the commutation process provided in this application embodiment is as described in S201 to S204 above. The commutation unit is further configured to, in response to the train about to enter the phase-splitting zone, control the power supply arm on the entering side to be connected to the neutral section, obtain the first voltage of the neutral section and the second voltage of the power supply arm on the exiting side; integrate the first voltage to obtain the first voltage integral value, integrate the second voltage to obtain the second voltage integral value; in response to the train fully entering the phase-splitting zone, calculate the absolute value of the difference between the first voltage integral value and the second voltage integral value; in response to the absolute value being less than a predetermined threshold, control the power supply arm on the exiting side to be connected to the neutral section; and in response to the train passing through the phase-splitting zone, control the power supply arm on the exiting side to be disconnected from the neutral section.

[0082] Correspondingly, the backup commutation unit is further configured to: acquire the contact network voltage and the current position of the train when the phase-splitting device is disconnected; generate a calculation node based on the contact network voltage; determine the executed commutation process based on the current position of the train; and obtain the remaining backup commutation process based on the executed commutation process. According to a specific implementation, if the backup commutation unit is used to control the backup phase-splitting device to continue commutating the train based on the backup commutation process, it includes: reacquiring the contact network voltage through the backup commutation device, matching the calculation node, and executing the remaining backup commutation process. It is understood that in commutation processes S201 to S204, the contact network voltage is continuously changing, and the corresponding integral value also changes accordingly. Therefore, when the phase-splitting device fails and exits, the corresponding integral calculation node can be obtained based on the contact network voltage at the time of its failure. For example, before the train enters the phase-splitting zone for commutation, only the integral value needs to be calculated. When the phase-splitting device fails and exits, a calculation node is generated based on the contact network voltage at the time of its exit. After the backup phase-splitting device is connected, the contact network voltage is reacquired and matched with the calculation node, thus resuming the integration process during the fault. This allows the backup commutation process to be executed completely without affecting the train's commutation. Similarly, when the train has fully entered the phase-splitting zone, the comparison calculation is based on the integrated value of the contact network voltage. This is also based on continuous calculation of the contact network voltage. When the phase-splitting device fails and exits, the above comparison calculation is also suspended. In this case, after the backup commutation device is connected, the contact network voltage is reacquired and matched with the calculation node generated based on the contact network voltage at the time of the phase-splitting device's exit. This allows the results of the above comparison calculation to continue, thereby taking over the control of the power supply arm on the departure side and the neutral section to complete the commutation. This application embodiment generates a calculation node by obtaining the contact network voltage when the phase-splitting device fails and exits the system. After the standby phase-splitting device rereads the contact network voltage, the calculation node is matched to take over and complete the phase-splitting action. This can help the standby phase-splitting device to perform correction and verification, and ensure the reliability and integrity of the phase-splitting process.

[0083] In some embodiments, in order to ensure the reliability and integrity of the commutation process, the backup phase-splitting device can also be configured to synchronously acquire the contact network voltage and synchronously perform the above-mentioned integration process with the phase-splitting device. This ensures that when the phase-splitting device fails, only a switch switching is required to enable the backup phase-splitting device to continue the commutation process, facilitating a quick and flexible response from the line.

[0084] In one possible implementation, in the above commutation process, an integral value of the first voltage is obtained by integrating the first voltage of the neutral section, and an integral value of the second voltage is obtained by integrating the second voltage of the power supply arm on the departure side. The formula for calculating the first voltage integral value is as follows:

[0085] Φn =∫U n dt,

[0086] Φ n This is the integral value of the first voltage.

[0087] The formula for calculating the second voltage integral value is:

[0088] Φ b =∫U b dt,

[0089] Φ b This is the integral value of the second voltage.

[0090] The commutation unit responds to the train fully entering the phase-splitting zone by controlling the disconnection of the power supply arm and neutral section on the entering side. After the train enters the phase-splitting zone, the third ground positioning device PS3 begins detecting whether the train has fully entered the zone. The commutation unit responds to the train fully entering the phase-splitting zone by controlling the disconnection of the power supply arm and neutral section on the entering side, and compares the first voltage integral value Φ. n and the second voltage integral value Φ b The difference is obtained. When the difference is less than a predetermined threshold, the commutation unit controls the power supply arm on the departure side and the neutral section to be turned on. At this time, the voltage of the neutral section is equal to the voltage of the power supply arm on the departure side, thus completing the commutation of the train from the power supply on the arrival side to the power supply arm on the departure side.

[0091] In this process, the backup phase switching unit is also used to obtain the contact network voltage when the phase switching device is disconnected and generate a calculation node when the phase switching device fails, and then switch the backup phase switching device to match the calculation node to continue phase switching for the train.

[0092] The automatic phase-change commutation device for up and down lines with backup provided in this application embodiment can respond promptly when the phase-change device fails, and control the backup phase-change device to take over the phase-change operation to continue the phase change. This realizes the close connection of the backup phase-change device in the automatic phase-change commutation device for up and down lines with backup, and improves the stability of the train phase change when entering the phase-change zone.

[0093] It should be understood that the apparatus disclosed in the embodiments of this application can be implemented in other ways. For example, the division of units is merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the communication connection between units may be through some interface, server, or indirect coupling or communication connection, and may be electrical or other forms.

[0094] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each module can exist physically separately, or two or more modules can be integrated into one processing unit. The integrated units described above can be implemented in hardware or as software functional units.

[0095] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the functions of the apparatus described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0096] Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner for ease of understanding.

[0097] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A ground-based automatic phase-switching device with backup for uplink and downlink traffic, characterized in that, The device includes: The commutation unit is used to commutate the train entering the phase separation zone by controlling the phase separation device based on the commutation process. The monitoring unit is used to obtain the status of the phase-splitting device under the current commutation process; A control unit is configured to, in response to a fault condition in the phase-splitting device, control the phase-splitting device to disconnect from the phase-splitting zone and control a backup phase-splitting device to connect to the phase-splitting zone; A backup commutation unit is used to control the backup phase-splitting device to continue commutating the train based on the backup commutation process.

2. The uplink and downlink automatic phase-switching ground device with backup as described in claim 1, characterized in that, The commutation unit is specifically used for: In response to the train about to enter the phase separation zone, the power supply arm on the entering side is connected to the neutral section. In response to the train fully entering the phase-separation zone, the power supply arm on the entering side is switched off from the neutral section, and the power supply arm on the exiting side is switched on from the neutral section. In response to the train passing through the phase separation zone, the power supply arm on the departure side and the neutral section are switched off.

3. A ground-based automatic phase-switching device with backup capability as described in claim 2, characterized in that, The backup commutation unit is specifically used for: Obtain the current position of the train when the phase-splitting device is disconnected; Based on the current position of the train, the executed commutation process is determined, and the remaining backup commutation process is obtained.

4. A ground-based automatic phase-switching device with backup capability as described in claim 1, characterized in that, The commutation unit is also used for: In response to the train about to enter the phase-splitting zone, the power supply arm on the entering side is controlled to be connected to the neutral section, and the first voltage of the neutral section and the second voltage of the power supply arm on the exiting side are obtained. Integrate the first voltage to obtain the first voltage integral value, and integrate the second voltage to obtain the second voltage integral value; In response to the train fully entering the phase-splitting zone, calculate the absolute value of the difference between the first voltage integral value and the second voltage integral value; In response to the absolute value being less than a predetermined threshold, the power supply arm on the departure side and the neutral section are controlled to be turned on. In response to the train passing through the phase separation zone, the power supply arm on the departure side and the neutral section are switched off.

5. A ground-based automatic phase-switching device with backup capability as described in claim 4, characterized in that, The backup commutation unit is also used for: Obtain the contact network voltage and the train's current position when the phase-splitting device is disconnected; Calculation nodes are generated based on the aforementioned contact network voltage; Based on the current position of the train, determine the phase commutation process that has been executed; The remaining backup commutation procedures are obtained based on the commutation procedures that have been executed.

6. A ground-based automatic phase-switching device with backup capability as described in claim 5, characterized in that, The backup phase-switching unit is used to control the backup phase-switching device to continue phase-switching the train based on the backup phase-switching process, including: The contact network voltage is reacquired through the backup commutation device and matched with the computing node to execute the remaining backup commutation process.

7. A ground-based automatic phase-switching device with backup capability as described in claim 3 or 5, characterized in that, The backup commutation unit includes a shaft counting sensor. The axle counting sensor is located in the phase-separation zone and is used to obtain the position of the train.

8. A ground-based automatic phase-change commutation device with backup capability as described in any one of claims 1 to 6, characterized in that, The device further includes: A switching device for connecting the phase splitter to the phase splitting zone, and for connecting a standby phase splitter to the phase splitting zone.

9. A ground-based automatic phase-switching device with backup capability as described in claim 8, characterized in that, The phase-splitting device is connected to the uplink and downlink lines of the phase-splitting zone through the switching device, and the backup phase-splitting device is connected to the position in the phase-splitting zone corresponding to the phase-splitting device through the switching device.

10. A ground-based automatic phase-switching device with backup capability as described in claim 9, characterized in that, The phase-splitting device and the backup phase-splitting device have the same structure, including a voltage detection device, a first thyristor device, and a second thyristor device; the voltage detection device is used to detect the voltage of the power supply arm on the driving-in side, the voltage of the power supply arm on the driving-out side, and the voltage of the neutral section; the first thyristor device is used to connect the power supply arm on the driving-in side and the neutral section; and the second thyristor device is used to connect the power supply arm on the driving-out side and the neutral section.

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